linux-kernel - Re: Monthly md check == hung machine; how do I debug?

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Message-ID: <20080205191806.GC9284@digitalkingdom.org>
Date:	Tue, 5 Feb 2008 11:18:06 -0800
From:	Robin Lee Powell <rlpowell@...italkingdom.org>
To:	Lennart Sorensen <lsorense@...lub.uwaterloo.ca>
Cc:	Nick Piggin <nickpiggin@...oo.com.au>, linux-kernel@...r.kernel.org
Subject: Re: Monthly md check == hung machine; how do I debug?

On Tue, Feb 05, 2008 at 01:55:17PM -0500, Lennart Sorensen wrote:
> I tend to adjust the max disk speed raid is allowed to use, since
> the default of 200MB/s makes the system close to unusable while it
> is taking place.  Could having slow disk access be causing things
> to lock up?

I don't know if it could or not, but I have no performance problems
at all when the sync is running, as long as it doesn't lock up, so
it seems unlikely to me.

(Shout out to a fellow CSC sysadmin, btw.)

-Robin

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